@misc{indiciaeb497091485e9,
  title = {The effect of processing code, response modality and task difficulty on dual task performance and subjective workload in a manual system},
  author = {Liu, Yili and Wickens, Christopher D.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880048234},
  note = {Source identifier: 19880048234}
}